Blog Description

Welcome to the Arizona Solar Racing Team's blog! Here you will find updates on our work, event announcements, photos, and links to our other sites.

Friday, April 9, 2010

UANEWS coverage

Check out the UANEWS coverage.

We'll be at the Biosphere 2 next Satday April 17.

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Wednesday, April 7, 2010

Giffords, Shelton and Hay

We had a awesome PR event last Thursday at the Steward Mirror lab as part of the Solar Bus tour that AZ rep. Giffords was part of.
It was an honor to have her, UA President Shelton and Provost Meredith Hay drive the car. The event was covered by the daily Wildcat and we were on the front page on Monday. Check it out:

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Sunday, March 28, 2010

Shell Eco race updates

Sorry for the lack of updates. I (Wei-Ren) have been busy with Jarod to fix more last minute problems but in the end we did manage to get all the electrical issues fixed and Mallory running smoothly. We finished in the end with 3149 miles per gallon (unofficial)!!!

Unfortunately, we cannot qualify as our car was also about 200 lbs more that the require weight limit because we overbuilt our car. If we were able to qualify we would be thousands of miles more mi/gal than the other urban challenge cars and 2nd overall to Purdue's vehicle. :( to that but we have certainly learned a lot for next year's car. Also unfortunate we didn't have members from last year to help us improve our car this year but fortunately we used double side duct tape to mount our Ga-As cells so we can reuse them for next year's urban challenge. We'll be getting some competition from Purdue in the urban concept next year and I am super excited if we were to come back next year with the same team to kick some butt.

Here is a recap of what happened at Shell Ecomarthon Houston 2010.
1. We found that our blocking diodes were wired backwards which was huge error on my (WR) part. Jarod and I fixed it and finish wiring up the array to the maximum power point trackers (MPPT). We also tried programing the remaining MPPTs we needed for the array. The Biel's MPPTs were a pain and we should get them fixed or replaced if we were to focus on the Shell Eco.

2. Friday
The course was opened for practice runs and I (WR) got out on the track with the batteries to get a few of the road and get a feel for the timing for the speed needed to get 10 laps and 3 10 seconds stops in 26 minutes.
At night, we finally manage to successfully reprogram 4 MPPTs out of the 8 we had. These MPPTs seriously need to be replaced or refurbished. It took way way too long to get that done and anyways they aren't all that efficient at the low voltage we were running Mallory at.

3. Saturday
We had a few good runs on the course, and had a better feel with the driving strategy. After the first heat, we tried tweaking the motor a little more and ran down the battery a little more from the full pack that we started. The next heat, we unfortunately drained our battery pack down to NIL as the weather was horrible so at night before we left charging up the batteries overnight.
Also, I popped the steering out from the steering rack and was fixed later by Sean.

4. Sunday
In the morning, the packs were only charged up 30% and was not sufficient during heat #4. The BPS shut us of as I tried limping back into the pits. We switched out our battery pack with our spare battery cells and were able to get up into heat #5 and heat #6. The weather was perfect for solar racing and we manage to pull of 3149 miles/ gallon (unofficial). Unfortunately, we can't qualify due to our weight.

Well that's a recap of what has happened. I'll update later with pictures and more notes.

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3,149 MPG!

The team managed to get 3149 miles per gallon with the (not so) svelte Mallory.

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Friday, March 26, 2010


Day 2 was some what successful. We managed to pass all our tech inspections which were a breeze compared to the North American Solar Challenge. The only thing that we failed to do was to be under the required weight limit of 350lb. Our chassis was definitely overbuilt for this competition. The Elecs had their own fair share of issues. We had problems programming 5 of the 9 maximum power point trackers. Jared and I spent the whole evening till midnight getting 4 MPPTs reprogram. The elecs are done done done at this point. It's unfortunate that we are so over weight.

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After a late night fixing problems we are all set to go on the track.

Wednesday, March 24, 2010


It begins!

The moment of truth has arrived! See y'all in Texas...

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We're off to Houston!

After many weeks and months of hardwork and dedication by the team. We're all set for Shell Ecomarathon in Houston.

We'll be leaving early in the morning to reach Houston in the Morning to make registration on Thrusday and have the car prep-ed for the trial runs.

Representing U of Arizona in Houston:
Sean Miller (Mech lead, Co-manager)
Wei-Ren Ng (EE lead, Co-manager)
Sergio Reyes (Mech)
Jinwo Song (Mech)
Francisco Chateau (EE)
Josh Gustafson (EE)
Clark Pederson (Mech)
Jarod Prosise (Alumnus, EE)
Mike Martinez (Mech)

The rest of the team:
Chad Essig (EE)
Arshed Al-Obeidi
Chelsea Oertle (Eller)
Arun Ganesan (EE, CS)
Garrett Vanhoy
Knut Norstog
Jeff Chia
Hannah Kosinski

Special Thanks to:
MSE Department
ECE Department
and all our sponsors and supporters!!


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Friday, March 12, 2010

Spring break sprint

As you are likely aware, this our best chance to finish the remaining work. We're almost there. Keep an eye on the listserv for work schedules/when people will be at the shop.

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We've set up a posterous site...

This allows us to update our blog, and this space, more effectively! Look forward to on the road/ringside info!

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